Metal working – Method of mechanical manufacture – Electrical device making
Patent
1981-10-19
1983-11-29
Goldberg, Howard N.
Metal working
Method of mechanical manufacture
Electrical device making
29830, 357 69, H05K 334
Patent
active
044173920
ABSTRACT:
In a multi-layer ceramic package, a plurality of ceramic lamina each has a conductive pattern, and there is an internal cavity of the package within which is bonded a chip or a plurality of chips interconnected to form a chip array. The chip or chip array is connected through short wire bonds at varying lamina levels to metalized conductive patterns thereon, each lamina level having a particular conductive pattern. The conductive patterns on the respective lamina layers are interconnected either by tunneled through openings filled with metalized material, or by edge formed metalizations so that the conductive patterns ultimately connect to a number of pads at the undersurface of the ceramic package mounted onto a metalized board. There is achieved a high component density; but because connecting wire leads are "staggered" or connected at alternating points with wholly different package levels, it is possible to maintain a 10 mil spacing and 10 mil size of the wire bond lands. As a result, there is even greater component density but without interference of wire bonds one with the other, this factor of interference being the previous limiting factor in achieving high component density networks in a multi-layer ceramic package.
REFERENCES:
patent: 3435516 (1969-04-01), Kilby
patent: 3436604 (1969-04-01), Hyltin et al.
patent: 3626259 (1971-12-01), Garboushian et al.
patent: 3651434 (1972-03-01), McGeough et al.
patent: 3676748 (1972-07-01), Kobayashi et al.
patent: 3828228 (1974-08-01), Wong et al.
Elsner James E.
Ibrahim Shawki S.
Arbes Carl J.
CTS Corporation
Goldberg Howard N.
Palguta Larry J.
Young John A.
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